I do both, it's usually about an hour workout. I am trying to do cardio every single day for the next 3 months. I was really disappointed with myself yesterday when I skipped and took a nap after work instead. I had a small window and I failed. That was disappointing, but I was really tired.

The cardio part takes 29 minutes. I have gradually increased speed over the past 3 weeks...I started at 7, 7.2, 7.4 and struggled...now I'm up to 7.7 and sometimes I feel like I could keep going, but I don't want to over exert myself and make up excuses to not go.

I always hit my arm days...sometimes I'm lazy on leg days. I feel like I'm still getting a decent workout in my legs every day I run, though.

I feel like anyone who doesn't enjoy "jogging" for 10-15 straight minutes should really try the 2 minute running hard, 1 minute walking intervals. I used to struggle jogging 1-1.5 miles and now I do 3 miles at an average pace of just under 10 minutes with these intervals, warm-up and cool down. It also keeps you from being discouraged when you get "tired", look down, see you only have 30 seconds until walking for a minute and you can push through it.

My roommate does the intervals but instead of walking he just jumps to the side of the treadmill...I prefer walking, but I've done both. People look at you kind of weird when you do the side thing.